利用磁性聚苯胺纳米粒子与微取样注射-火焰原子吸收光谱联用技术分析水中的铬。

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Accounts of Chemical Research Pub Date : 2023-10-29 eCollection Date: 2024-01-01 DOI:10.55730/1300-0527.3636
Osman Çaylak
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引用次数: 0

摘要

利用磁性聚苯胺纳米粒子(Fe3O4@PANI NPs)固相萃取结合微取样进样-火焰原子吸收光谱法(MIS-FAAS)优化了铬的标样程序。在 pH 值为 8.0 的条件下,Fe3O4@PANI NPs 成功实现了铬的分级。铬(III)和铬(VI)的回收率分别高于 95% 和低于 5%。使用 25 mg Fe3O4@PANI NPs 和 500 μL 用 2 mol L-1 HCl 配制的 0.2%(w/v)硫脲 (TU) 溶液作为洗脱剂,40.0 mL 样品中的 Cr(III) 回收率超过 95%。将六价铬还原为三价铬后,定量提取三价铬。该方法的线性范围、检出限、预富集因子和精密度分别为2.5~94.0 μg L-1、0.335 μg L-1、80和3.07%。以 SPS-WW2 第 114 批废水和 BCR-715 工业废水作为环境水标准物质(SRM)对该方法进行了验证,结果与认证值基本一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chromium speciation in water using magnetic polyaniline nanoparticles coupled with microsampling injection-flame atomic absorption spectroscopy.

The chromium speciation procedure was optimized using magnetic polyaniline nanoparticles (Fe3O4@PANI NPs) solid-phase extraction coupled with microsampling injection-flame atomic absorption spectrometry (MIS-FAAS). Chromium speciation was successfully achieved by Fe3O4@PANI NPs at pH 8.0. The recoveries obtained for Cr(III) and Cr(VI) were above 95% and under 5%, respectively. Recoveries of over 95% for Cr(III) from 40.0 mL of the sample were obtained using 25 mg Fe3O4@PANI NPs and 500 μL of 0.2% (w/v) thiourea (TU) solution prepared in 2 mol L-1 HCl as eluent. Total chromium as Cr(III) was extracted quantitatively after reducing the Cr(VI) to Cr(III). The linear range, detection limit, preconcentration factor, and precision of the optimized method for Cr(III) in aqueous solution were 2.5-94.0 μg L-1, 0.335 μg L-1, 80, and 3.07%, respectively. The validation of the method was controlled using SPS-WW2 Batch 114 wastewater and BCR-715 industrial wastewater as standard reference materials (SRMs) for environmental water, and the obtained results were in close agreement with the certified values.

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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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